PENSION AND OTHER POSTRETIREMENT PLANS (Additional Information) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans Target Allocation Percentage	60.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.70%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plans Target Allocation Percentage	40.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	3.00%
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 2,900,000	$ 2,800,000
Assets for Plan Benefits, Defined Benefit Plan	$ 2,353,000	$ 2,059,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.50%	7.00%	7.75%
Defined Benefit Plan, Expected Amortization, Next Fiscal Year	$ 193,000
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	0
Pension Plans, Defined Benefit [Member] | Accrued Interest and Dividend Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	$ 3,000	$ 4,000
Pension Plans, Defined Benefit [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.69%
Pension Plans, Defined Benefit [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	3.00%
Supplemental Employee Retirement Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 1,100,000	1,200,000
Assets for Plan Benefits, Defined Benefit Plan	$ 1,046,000	$ 996,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.50%	7.00%	7.75%
Defined Benefit Plan, Expected Amortization, Next Fiscal Year	$ 73,000
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	0
Supplemental Employee Retirement Plans, Defined Benefit [Member] | Accrued Interest and Dividend Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Assets for Plan Benefits, Defined Benefit Plan	$ 2,000	$ 4,000
Supplemental Employee Retirement Plans, Defined Benefit [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.69%
Supplemental Employee Retirement Plans, Defined Benefit [Member] | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	3.00%